The Worldtree

If The Worldtree would enter play, you may pay {6}{g}{g}{g} instead. (This cost can be reduced by {x} by removing X Bloom counters from permanents
you control.) If you do, put it into play. If you
don't, put it into its owner's graveyard.
{g}{g}{g}: Target player may search their library
for a permanent card, put it into play, and
shuffle their library. Target player gains life
equal to that permanent's converted mana cost.